Operating system and steam turbine: what they have in common

1. Step 1. Operating system — is used in — Personal computer. An operating system.
2. Step 2. Personal computer — has part — Switched-mode power supply. A power supply.
3. Step 3. Switched-mode power supply — has part — Transformer. A high-frequency transformer.
4. Step 4. Transformer — is part of — Nuclear power plant. Transformers step up the voltage so the plant's power can travel far.
5. Step 5. Nuclear power plant — has part — Steam turbine. Steam turns the turbines — as at a thermal station.

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